There are a lot of tree/subtask todo apps, although I don't know of one exactly like you listed. Perhaps try Nozbe? http://www.nozbe.com/tour/ http://www.nozbe.

There are a lot of tree/subtask todo apps, although I don't know of one exactly like you listed. Perhaps try Nozbe? http://www.nozbe.com/tour/ http://www.nozbe.com/tour/